22645
domain: N
Appears in sequences
- Numbers k such that 35*2^k+1 is prime.at n=23A032367
- Numbers whose set of base-12 digits is {1,3}.at n=32A032919
- Decimal part of n-th root of a(n) starts with digit 2.at n=53A034079
- Min[x] composite zero site for sigma(x+6^n) - sigma(x) - 6^n.at n=8A055036
- Number of A095744-primes in range ]2^n,2^(n+1)].at n=24A095754
- Partial sums of orders of finite perfect groups (A060793).at n=19A121513
- a(n) = n*(n^2 + 2*n - 1)/2.at n=34A127736
- Appears in Taylor series of powers of generalized Bessel functions.at n=6A131490
- Wiener index of the prism graph Y_n on 2n nodes.at n=34A138179
- Number of ways to partition a 2*n X 3 grid into 2 connected equal-area regions.at n=7A167242
- Wiener index of the Moebius ladder M(n).at n=34A180857
- Right edge of the triangle A045975.at n=34A204557
- Composite numbers coprime to 6 such that A179382(n) = A000265(n-1), the odd part of n-1.at n=36A225913
- 40-gonal numbers: a(n) = 38*n*(n-1)/2 + n.at n=35A261191
- Number of minimum edge covers in the n-dipyramidal graph.at n=34A298822
- a(n) is the number of n X n matrices with nonnegative integer entries, row sums 1,2,...,n and column sums 1,2,...,n.at n=5A361749