23347
domain: N
Appears in sequences
- The n-th n-gonal number: a(n) = n*(n^2 - 3*n + 4)/2.at n=37A060354
- Sum of absolute values of real and imaginary parts of the coefficients in the expansion of 1 / (1 - x - 2*I*x^2), where I^2=-1.at n=17A218138
- Sum of smallest parts of all partitions of n into an odd number of parts.at n=40A222044
- 37-gonal numbers: a(n) = n*(35*n-33)/2.at n=37A282852
- Numbers k such that (2*10^k - 197)/3 is prime.at n=17A295387
- Numbers k such that lambda(k) = lambda(k+2), where lambda is the Carmichael lambda function (A002322).at n=30A333742
- Setwise difference A340150 \ A340076.at n=45A340151
- Expansion of e.g.f. (1 + x)*(1 + x^2/2)*cosh(x).at n=37A388428