48951

Appears in sequences

• a(n) = a(n-1) + a(n-2) + 1 for n > 1, a(0)=1, a(1)=5.at n=20A022319
• a(n) = n^2*(n^2+3)/4.at n=20A039623
• Numbers k such that (7*3^k + 5)/2 is prime.at n=15A059528
• Nonpalindromic numbers k such that k is not divisible by 10 and k*R(k) is a square, where R(k) is the reversal of k (A004086).at n=37A062917
• a(n) = A080301(A080268(n)).at n=4A080271
• Numbers k such that all the following properties hold: (i) k*reverse(k) is a square; (ii) k != reverse(k); (iii) k and reverse(k) are not both squares; and (iv) k and reverse(k) have the same number of digits.at n=23A082994
• Numbers k such that both the k-th and (k+1)-th primes have the same sum of digits squared but different sets of digits.at n=27A109183
• 10-gonal numbers for which the sum of the digits is also a 10-gonal number.at n=16A119547
• 10-gonal numbers which are divisible by the sum of their digits.at n=39A119548
• Numbers k with property that 19*k + {2,4,8,10} are two pairs of consecutive twin primes.at n=11A152926
• a(n) = 27*(n - 6)^2 + 4*(n - 6)^3 = ((n - 6)^2)*(4*n + 3).at n=27A245032
• Non-palindromic numbers n such that the square root of n multiplied by the reversal of n is a palindrome.at n=14A258382