Let a(n) be the least k such that in the prime power factorization of k! the exponents of primes p_1, ...,p_n are even, while the exponent of p_(n+1) is odd.

A240537

Let a(n) be the least k such that in the prime power factorization of k! the exponents of primes p_1, ...,p_n are even, while the exponent of p_(n+1) is odd.

Terms

    a(0) =12a(1) =6a(2) =10a(3) =20a(4) =48a(5) =54a(6) =338a(7) =875a(8) =2849a(9) =1440a(10) =3841a(11) =816a(12) =59583a(13) =101755a(14) =40465a(15) =37514a(16) =409026a(17) =268836a(18) =591360a(19) =855368a(20) =5493420a(21) =9627251a(22) =28953290a(23) =14557116a(24) =7336812a(25) =1475128a(26) =127632241a(27) =531296823a(28) =3028478192a(29) =2435868325

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