21964
domain: N
Appears in sequences
- Numbers k such that 97*2^k+1 is prime.at n=14A032398
- Numbers k such that the concatenation of k with k-8 gives a square.at n=4A115435
- Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 2.at n=4A116095
- Numbers n such that n^4 is a sum of 4th powers of four nonzero integers whose sum is n.at n=3A138760
- Number of zig-zag paths from top to bottom of a rectangle of width 10 with n rows.at n=12A153360
- a(n) = n^2*(n^2 + 15)/4.at n=17A159833
- Number of partitions where the number of 1's and 2's are equal.at n=50A174455
- Number of (w,x,y) with all terms in {0,...,n} and w<x+y and x<y.at n=37A212980
- a(n) = 19*n^2.at n=34A244631
- a(n) = (4*n+8)*n^2.at n=17A258617