18626

Appears in sequences

• a(n) = (7*n+1)*(7*n+6).at n=19A001526
• Least increasing sequence with a(1) = 1 and Hankel transform {1,1,1,1,...}.at n=6A055877
• Smallest multiple of n-th prime which is == 1 mod (n+1)-st prime.at n=33A073603
• Least number k > (2n-1) such that (2n-1)^k - 2 is prime, or 0 if no such number exists.at n=44A133856
• Indices m such that A128646(m)-1 is prime, where A128646 = denominator of partial sums of 1/(p(i)-1).at n=50A137689
• Gog words avoiding the subpattern 312.at n=6A180349
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 113", based on the 5-celled von Neumann neighborhood.at n=29A270179
• Number of decagons that can be formed with perimeter n.at n=41A288256
• E.g.f.: exp(2 * (exp(x) - 1 - x - x^2 / 2)).at n=10A339014
• Numbers k such that the k-th composition in standard order is an alternating permutation of {1..k} for some k.at n=33A349051