22272

Appears in sequences

• Powers of fifth root of 19 rounded down.at n=17A018168
• Powers of fifth root of 19 rounded to nearest integer.at n=17A018169
• a(n) = Sum_{i=1..floor((n+1)/4)} a(2*i-1) * a(n-2*i+1), with a(1)=a(3)=2 and a(2)=1.at n=13A024739
• Theta series of 10-dimensional 2-modular lattice of minimal norm 2.at n=10A029545
• Numbers having four 2's in base 10.at n=21A043500
• a(n) contains n digits (either '2' or '7') and is divisible by 2^n.at n=4A053318
• Number of nonsingular n X n (-1,1)-matrices.at n=4A056990
• Triangle read by rows: T(n,k) = number of rational (+1,-1) matrices of rank k (n >= 1, 1 <= k <= n).at n=9A064231
• Multiples of 6 with only prime digits (2, 3, 5 and 7).at n=28A077535
• Binomial transform of A084265.at n=10A084266
• On a 3 X 3 board, the number of n-move paths for a chess king.at n=6A086349
• Square spiral of sums of selected preceding terms, starting at 1 (a spiral Fibonacci-like sequence).at n=21A094768
• Lenny Conundrum #168: Neopet species in alphabetical order, converted to digits by the phone keypad code.at n=0A119568
• Least number k such that sigma_n(k) > sigma_n(k+1), where sigma_n(k) = sum of the n-th powers of the divisors of k.at n=11A158661
• Numbers of the form p^8*q*r where p, q, and r are distinct primes.at n=12A179747
• Number of (w,x,y,z) with all terms in {1,...,n} and w^3>x^3+y^3+z^3.at n=19A212099
• Even numbers in A221715.at n=16A213218
• Number of partitions of n such that (number parts having multiplicity 1) is a part or (number of parts > 1) is a part.at n=39A241515
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood.at n=14A278424
• Numbers with digits 2 and 7 only.at n=32A284921