37914

Appears in sequences

• Numbers n such that 9*10^n + 6*R_n - 5 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=19A103103
• Sum over all partitions of n of the sum of the parts that are smaller than the largest part.at n=25A116688
• Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only either as two by three or three by two blocks.at n=23A146157
• a(n) = a(n-1) + a(n-3) + a(n-5) - a(n-6), a(0) = a(1) = a(2) = 1, a(3) = 2, a(4) = 3, a(5) = 5.at n=27A278706
• a(n) = Sum_{k=1..n} sigma(k)*sigma(2*k), where sigma(n) = A000203(n) is the sum of the divisors of n.at n=24A347108