18941
domain: N
Appears in sequences
- a(n) = n*(2*n^2 - 3*n + 4)/3.at n=31A037235
- Engel expansion for tan(1).at n=6A084652
- Sum of the prime(n) primes following prime(n).at n=19A099274
- Sum of the even-indexed parts of all partitions of n.at n=24A207382
- Number of (w,x,y) with all terms in {0,...,n} and x != min(|w-x|, |x-y|).at n=26A213502
- Lengths of complete iterations (direct and reverse branches) of the Kolakoski sequence A000002.at n=39A249508
- Numbers M(n) which are the number of terms in the sums of consecutive cubed integers equaling a squared integer, b^3 + (b+1)^3 + ... + (b+M-1)^3 = c^2, for a first term b(n) being an odd squared integer (A016754).at n=12A253707
- Product of n and the sum of remainders of n mod k, for k = 1, 2, 3, ..., n.at n=46A256532
- Numbers k such that (17*10^k - 77)/3 is prime.at n=26A273371
- Partial sums of A299272.at n=24A299273
- Nonsemiprimes in A306097 = A121707 \ A267999.at n=25A321488