23863

Appears in sequences

• Row sums of triangle A049325.at n=7A049349
• a(n) = n*(2*n^2 -3*n +7)/6 = C(n, 1) + C(n, 2) + 2*C(n, 3).at n=41A081489
• Maximal troughs in decimal expansions of Pi: positions of troughs equal to 8.at n=23A105276
• Heptagonal numbers divisible by 7.at n=28A117795
• The first of three consecutive heptagonal numbers the sum of which is equal to the sum of three consecutive primes.at n=5A298301
• Numbers that can be written as a^2 + 3*b^2 for some a, b in A155716 and also as c^2 + 6*d^2 for some c, d in A092572.at n=17A380295