26978

Appears in sequences

• Expansion of 1/(1-x^2-x^3-x^4-x^5-x^6-x^7-x^8-x^9-x^10).at n=24A013987
• Numbers k such that sopf(k) = sopf(k+2), where sopf(k) = A008472(k).at n=22A063968
• The row sums of the ED3 array A167572 read by antidiagonals.at n=5A167579
• Cyclically smooth Lyndon words with 7 colors.at n=11A215338
• Numbers k such that Fibonacci(k) == +-1 (mod k) and k is neither 1 nor prime nor twice a prime.at n=32A279072
• Expansion of e.g.f. exp(Sum_{k>=1} d(k)*x^k/k!), where d(k) is the number of divisors of k (A000005).at n=8A295739
• Numbers m such that abs(K(m+1) - K(m)) = 1, where K(m) = A002034(m) is the Kempner function.at n=27A346211
• Number of twice-partitions of n into odd-length partitions.at n=19A358334
• Expansion of Sum_{k>=0} (x * (1 + (k * x)^3))^k.at n=10A360747
• a(n) = greatest number of unrestricted partitions between successive strict partitions of n, with partitions listed in Mathematica order.at n=51A366883