18279

Appears in sequences

• Expansion of Product_{m>=1} (1+q^m)^(-27).at n=4A022622
• "CFK" (necklace, size, unlabeled) transform of 1,3,5,7...at n=14A032142
• a(n) = smallest number > a(n-1) such that a(1)*a(2)*...*a(n) + 1 and a(1)*a(2)*...*a(n) - 1 are primes.at n=39A051956
• a(n) = n^3 + n^2 + n + 1.at n=26A053698
• Partial sums of sequence (essentially A002378): 1, 2, 6, 12, 20, 30, 42, 56, 72, 90, ...at n=37A064999
• a(n) = 1 + Sum_{i=1..n} S2(i)*2^i, where S2(n) is digit sum of n, n in binary notation.at n=12A135570
• a(n) = 25*n^2 + 2*n.at n=26A154377
• a(n) = (26^n - 1)/25.at n=4A218729
• Number T(n,k) of endofunctions f on [n] satisfying f^3(i) = i for all i in [k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=31A245958
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 355", based on the 5-celled von Neumann neighborhood.at n=30A271399
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 361", based on the 5-celled von Neumann neighborhood.at n=29A271416
• Numbers n such that the decimal representation of the Elias delta code of n is a palindromic prime.at n=1A281496
• The least common multiple of 1+n and 1+n^2.at n=26A281660
• Number of distinct terms in row n of A049455.at n=22A293165
• a(n) = A333552(A333551(n)): indices of terms in Recamán's sequence A005132 where the construction avoided a record-sized collision.at n=42A333553
• a(n) is the arithmetic mean of all multiplicative arithmetic functions f(n) with f(p^e) returning a monic degree 3 Littlewood polynomial of p.at n=25A386704