26850

Appears in sequences

• Number of partitions of n into parts not of the form 11k, 11k+5 or 11k-5. Also number of partitions with at most 4 parts of size 1 and differences between parts at distance 4 are greater than 1.at n=46A035948
• Numbers k that, when expressed in base 5 and then interpreted in base 9, give a multiple of k.at n=31A062931
• First of triples of consecutive happy numbers, i.e., the first of three consecutive integers each of which is a happy number (A007770).at n=27A072494
• Number of -4..4 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.at n=3A200549
• T(n,k)=Number of -k..k arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.at n=24A200553
• Number of -n..n arrays x(0..5) of 6 elements with zero sum and nonzero second differences.at n=3A200556
• Number of (w,x,y) with all terms in {0,...,n} and w<x+y and x<=y.at n=39A212982
• Least number k such that k*n^k - 1 is prime. a(n) = 0 if no such number exists.at n=28A240235
• Least number k > n - 2 such that k*n^k - 1 is prime.at n=28A327661
• Number of mutual-visibility sets in the n-Moebius ladder.at n=11A389185