23101

Appears in sequences

• Number of binary rooted trees with n nodes and height exactly 6.at n=23A036595
• House numbers: a(n) = (n+1)^3 + Sum_{i=1..n} i^2.at n=25A051662
• Numbers k such that A048138(k) is a prime and sets a new record for such primes.at n=38A064440
• Smallest number == 0 mod (n+1)-th prime and == 1 mod all smaller primes.at n=4A075306
• Write 1/e as a binary fraction; read this from left to right and whenever a 1 appears, note the integer formed by reading leftwards from that 1. Then convert those integers from binary into decimal numbers.at n=8A099970
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.at n=8A150219
• a(n) = a(n-1) # n, where # is addition, subtraction, multiplication if prime(n) == respectively 0, 1, 2 (mod 3).at n=12A154382
• Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having a sum of two or less, with rows and columns of the latter in lexicographically nondecreasing order.at n=24A227259
• The 60-degree spoke (or ray) of a hexagonal spiral of Ulam.at n=44A244802
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 313", based on the 5-celled von Neumann neighborhood.at n=32A271202
• a(n) = [x^n] (1/(1 - x))*Product_{k>=1} (1 + n*x^k).at n=10A304782
• Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.at n=6A304896
• Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.at n=2A304900
• T(n,k) = Number of n X k 0..1 arrays with every element unequal to 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.at n=38A304901
• T(n,k) = Number of n X k 0..1 arrays with every element unequal to 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.at n=42A304901
• Number of degrees of irreducible representations of symmetric group S_n that appear more than once.at n=42A318558
• Constant term in the expansion of (1 + x^3 + y^3 + 1/(x*y))^n.at n=11A361699