22979

Appears in sequences

• Partial sums of A056272.at n=8A099265
• Numbers k such that both the k-th and (k+1)-th primes have the same sum of digits squared but different sets of digits.at n=8A109183
• Number of 3 X n matrices containing a 1 in the top left entry, all entries are integer values and adjacent entries differ by at most 1.at n=3A138978
• Number of 4 X n matrices containing a 1 in the top left entry, all entries are integer values and adjacent entries differ by at most 1.at n=2A138979
• 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), (-1, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.at n=8A149711
• a(1) = 2; for n>1, a(n) = largest integer such that the sequence b(n) = a(n)^(1/n) is decreasing.at n=19A207976
• T(n,k)=Number of nXk 0..4 arrays with entries increasing mod 5 by 0, 1 or 2 rightwards and downwards, starting with upper left zero.at n=17A222169
• T(n,k)=Number of nXk 0..4 arrays with entries increasing mod 5 by 0, 1 or 2 rightwards and downwards, starting with upper left zero.at n=18A222169
• Expansion of phi(x^2) / f(-x) in powers of x where phi(), f() are Ramanujan theta functions.at n=32A226622
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 793", based on the 5-celled von Neumann neighborhood.at n=28A273566
• Numbers k such that (10^k - 13)/3 is prime.at n=18A280017
• Expansion of Product_{k>=1} (1 + x^(5*k-4))^(5*k-4).at n=53A285338
• Convolution of A007528 and A002476.at n=12A354543
• Deficiency of prime-shifted squares: a(n) = 2*A003961(n^2) - sigma(A003961(n^2)), where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1).at n=47A378231
• a(n) = numerator(Sum_{k=1..n} d(k+1)/d(k)), where d is the number of divisors function.at n=44A386925
• Number of proper 3-partitions of the vertices of the fan graph on n vertices such that every triangle uses exactly 2 colors.at n=13A389886