19437

Appears in sequences

• Denominator of (2n+1)(2n+2) B_{2n}, where B_n are the Bernoulli numbers. Also denominators of the asymptotic expansion of the polygamma function psi'''(z).at n=46A006956
• Eighth column (k=7) of septinomial array A063265.at n=9A063267
• Starting positions of strings of three 9's in the decimal expansion of Pi.at n=17A083642
• Starting positions of strings of four 9's in the decimal expansion of Pi.at n=4A083643
• Triple primorial n### = n#3.at n=11A114411
• a(n) = (2*n - 1) * (2^n - 1).at n=9A118414
• Numbers k which divide the sum of the Fibonacci numbers F(1) through F(k) and such that k is not a multiple of 24.at n=22A124456
• Rectangular table, read by antidiagonals, such that the g.f. of row n, R_n(y), satisfies: R_n(y) = [ Sum_{k>=0} y^k * R_{n*k}(y) ]^n for n>=0, with R_0(y)=1.at n=53A124550
• Row 1 of tables A124550 and A124560; also equals the antidiagonal sums of table A124550.at n=8A124551
• Rectangular table, read by antidiagonals, such that the g.f. of row n, R_n(y), satisfies: R_n(y) = Sum_{k>=0} y^k * [R_{n*k}(y)]^(n*k) for n>=0, with R_0(y)=1/(1-y).at n=53A124560
• Triangle, read by rows, where row n equals the inverse binomial transform of the column n in rectangular table A124550 (starting with row 1).at n=36A124568
• a(n) = 36*n^2 - 55*n + 21.at n=23A157262
• Numbers n with property that average digit of n^2 is s=7.at n=15A164773
• -3-Knödel numbers.at n=28A225507
• Number of nondecreasing -n..n vectors of length 4 whose dot product with some nondecreasing -n..n vector equals 4.at n=11A226412
• Pentagonal numbers which are the arithmetic mean of two consecutive primes.at n=15A234531
• Numbers n such that n^10+10 is prime.at n=31A239347
• Steffensen's bracket function [n,n-3].at n=17A241170
• Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=4A255154
• Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=2A255156