130636800
domain: N
Appears in sequences
- Bishops on an n X n board (see Robinson paper for details).at n=21A005633
- Number of reversible strings with n labeled beads of 3 colors, no palindromes of more than 1 bead.at n=7A032070
- Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*5^j.at n=30A038331
- Expansion of e.g.f. 1/((1-x)^2*(1-x^2)).at n=10A052618
- a(1) = 3, a(n) = smallest multiple of a(n-1) such that 10*a(n) + 1 is prime.at n=17A089325
- Product of the digital sums of n for all the bases 2 to n (a 'digital-sum factorial').at n=14A131384
- Where records occur in A152235.at n=15A152453
- Greatest common divisor of n! and its arithmetic derivative.at n=14A189102
- Number of ways to arrange n books on 3 consecutive shelves leaving none of the shelves empty.at n=7A200978
- a(1) = 1; thereafter a(n) is the product of all 0 < m < n for which n == a(m) (mod m).at n=42A271530
- Partial products of A023896.at n=9A280458