78253

Appears in sequences

• Numbers that are the sum of 2 positive 7th powers.at n=11A003369
• Numbers that are the sum of at most 2 positive 7th powers.at n=17A004864
• Numbers that are the sum of at most 3 positive 7th powers.at n=38A004865
• Numbers k that divide 5^k + 2^k.at n=8A045578
• Numbers k that divide 10^k + 4^k.at n=34A045594
• a(n) = 2^n + 5^n.at n=7A074600
• Numbers that can be represented as a^7 + b^7, with 0 < a < b, in exactly one way.at n=7A088719
• Sum of 7th powers of digits of n.at n=25A123253
• Numbers that are sums of seventh powers of two distinct primes.at n=1A132214
• Table T(k,n) read along antidiagonals: sum of the k-th powers of the distinct prime factors of A024619(n).at n=29A138296
• Triangle T(n,m,p,q) = (p^(n-k)*q^k + p^k*q^(n-k))*(StirlingS2(n, k) + StirlingS2(n, n-k)) with p=2 and q=5, read by rows.at n=28A154922
• Triangle T(n,m,p,q) = (p^(n-k)*q^k + p^k*q^(n-k))*(StirlingS2(n, k) + StirlingS2(n, n-k)) with p=2 and q=5, read by rows.at n=35A154922
• Sum of the 7th powers of the primes dividing n.at n=9A351195
• Sum of the 7th powers of the primes dividing n.at n=19A351195
• a(n) = n^7 * Sum_{p|n, p prime} 1/p^7.at n=9A351247
• Numbers which are the sum or difference of two seventh powers.at n=27A364654
• Expansion of (1/x) * Series_Reversion( x * (1-x) / (1+x^3)^2 ).at n=10A369266
• T(m, n) is the number of m X n period knot/link mosaics read by rows, with 1 <= n <= m.at n=21A375355