23738

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 14.at n=22A031692
• Distinct even numbers in writing first numerator and then denominator of each element of the 1/4-Pascal triangle (by row).at n=13A046589
• a(n) = 196*n^2 + 2*n.at n=10A158222
• a(n) = 484*n^2 + 22.at n=7A158629
• a(n) = n*(2*n^2 + 5*n + 1).at n=22A163832
• Numbers k such that Sum_{i=1..k} i^7 divides Product_{i=1..k} i^7.at n=23A166607
• a(n) = 49*n^2 + n.at n=21A173141
• Second elementary symmetric function of the first n terms of (2,2,3,3,4,4,5,5...).at n=25A203299
• Convolution of A000203 and A000009.at n=32A277029
• Number of surviving (but not bifurcating) odd nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).at n=39A293519
• a(n) = index of 2*prime(n) in A381019.at n=36A379811
• Expansion of (1/x) * Series_Reversion( x / (1 + x^2 * (1 + x)^2) ).at n=13A389062