207690
domain: N
Appears in sequences
- Smallest squarefree triangular number with exactly n prime factors.at n=6A127637
- Triangular numbers which are sums of 4 consecutive primes.at n=17A173420
- Least triangular number representable as a sum of n consecutive triangular numbers, or -1 if no such triangular number exists.at n=42A238017
- Triangular numbers representable as x*y+x+y such that x and y are triangular numbers, x>=y>0.at n=32A259745
- Triangular numbers representable as x*y+x+y such that x and y are triangular numbers, x>=y>1.at n=26A259746
- Triangular array read by rows. T(n,k) is the number of elements of rank k in the order complex of the poset P = [n] X [n], n=0, k=0 or n>0, 0<=k<=2n-1.at n=52A337192
- Triangular numbers which are products of six distinct primes.at n=0A362758